You need to understand the characteristics of both MegaMan X and Meddy. MegaMan X is known for his combat skills and sense of justice. Meddy might have her own special abilities or traits. Incorporate these into your story. For example, if Meddy can communicate with animals, it could be a key part of the plot. Also, don't forget to create interesting conflicts and challenges for them to overcome. It could be an external enemy, or an internal struggle within one of the characters. And make sure to write in a way that captures the essence of the 'MegaMan' universe.
One great 'MegaMan X Meddy' fanfiction could be about their adventures together in a post - apocalyptic world. They might team up to fight against powerful new enemies that threaten the remaining bits of civilization.
One popular fanfiction might be those that explore the relationship between the original Megaman and Megaman X in different timelines. For example, a story could focus on how X was created based on the original Megaman's design, and how their powers and abilities compare and contrast.
One idea could be a crossover adventure where Megaman X and Samus team up to fight a common enemy that threatens both of their worlds. They could start off as rivals, not trusting each other's methods at first, but as they face challenges together, they learn to respect and rely on one another.
Dr. Wily could be the main villain. He might have found a way to travel through time or dimensions to the world of Mega Man X. He then uses his knowledge of Mega Man's weaknesses and combines it with new technology in the Mega Man X world to create even more powerful and devious robots.
Perhaps in the fanfiction, Mega Man and Mega Man X meet in a virtual world created by a mad scientist. The virtual world is filled with distorted versions of their old enemies. They have to work together to find the core of this virtual world and shut it down. Along the way, they share their experiences and upgrade each other's abilities, leading to a new and more powerful form for both of them when they finally face the scientist.
It contributes by expanding the lore. Fanfictions can create new backstories for Protoman and Megaman, filling in gaps that the official games might not have covered. For example, their relationship before a certain event in the game timeline can be explored.
There could be epic battles. Maybe the characters from Megaman Starforce and Megaman X would team up to fight a powerful common enemy. They might combine their unique abilities, like the Starforce's EM Wave powers and X's advanced weaponry.
One key element is the contrast between Rock and X. Rock is more of a classic hero from an earlier era, while X has a more complex backstory. Their different personalities often lead to interesting interactions. Another element is the merging of their worlds. Since they come from different parts of the Megaman universe, how the fanfiction writer combines their settings is important.
First, you should have a clear idea of the plot. Are you going to create a new villain for them to fight? Or maybe a story about their training days. Then, study the characters well. Know their personalities, abilities, and how they interact in the original games.